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bake: deny access to local dockerfile for remote invocation with local context

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we don't currently support reading a remote Dockerfile with a local
context when doing a remote invocation because we automatically derive
the dockerfile from the context atm. To avoid mistakenly reading a local
Dockerfile, we check if the Dockerfile exists locally and if so, we
error out.

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
This commit is contained in:
CrazyMax 2023-10-19 13:29:36 +02:00
parent de9d253f45
commit 7497e6481e
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GPG Key ID: 3248E46B6BB8C7F7
2 changed files with 58 additions and 0 deletions
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18
bake/bake.go
View File

@ -1070,6 +1070,24 @@ func toBuildOpt(t *Target, inp *Input) (*build.Options, error) {
if err != nil {
return nil, err
}
} else if !build.IsRemoteURL(bi.DockerfilePath) && strings.HasPrefix(bi.ContextPath, "cwd://") && (inp != nil && build.IsRemoteURL(inp.URL)) {
// We don't currently support reading a remote Dockerfile with a local
// context when doing a remote invocation because we automatically
// derive the dockerfile from the context atm:
//
// target "default" {
// context = BAKE_CMD_CONTEXT
// dockerfile = "Dockerfile.app"
// }
//
// > docker buildx bake https://github.com/foo/bar.git
// failed to solve: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount3004544897/Dockerfile.app: no such file or directory
//
// To avoid mistakenly reading a local Dockerfile, we check if the
// Dockerfile exists locally and if so, we error out.
if _, err := os.Stat(filepath.Join(path.Clean(strings.TrimPrefix(bi.ContextPath, "cwd://")), bi.DockerfilePath)); err == nil {
return nil, errors.Errorf("reading a dockerfile for a remote build invocation is currently not supported")
}
}
if strings.HasPrefix(bi.ContextPath, "cwd://") {
bi.ContextPath = path.Clean(strings.TrimPrefix(bi.ContextPath, "cwd://"))

40
tests/bake.go
View File

@ -27,6 +27,7 @@ var bakeTests = []func(t *testing.T, sb integration.Sandbox){
testBakeRemoteCmdContextEscapeRoot,
testBakeRemoteCmdContextEscapeRelative,
testBakeRemoteDockerfileCwd,
testBakeRemoteLocalContextRemoteDockerfile,
}
func testBakeLocal(t *testing.T, sb integration.Sandbox) {
@ -348,3 +349,42 @@ COPY foo /foo
)
require.Error(t, err, out)
}
func testBakeRemoteLocalContextRemoteDockerfile(t *testing.T, sb integration.Sandbox) {
bakefile := []byte(`
target "default" {
context = BAKE_CMD_CONTEXT
dockerfile = "Dockerfile.app"
}
`)
dockerfileApp := []byte(`
FROM scratch
COPY foo /foo
`)
dirSpec := tmpdir(
t,
fstest.CreateFile("docker-bake.hcl", bakefile, 0600),
)
dirSrc := tmpdir(
t,
fstest.CreateFile("Dockerfile.app", dockerfileApp, 0600),
fstest.CreateFile("foo", []byte("foo"), 0600),
)
git, err := gitutil.New(gitutil.WithWorkingDir(dirSpec))
require.NoError(t, err)
gitutil.GitInit(git, t)
gitutil.GitAdd(git, t, "docker-bake.hcl")
gitutil.GitCommit(git, t, "initial commit")
addr := gitutil.GitServeHTTP(git, t)
out, err := bakeCmd(
sb,
withDir(dirSrc),
withArgs(addr, "--set", "*.output=type=cacheonly"),
)
require.Error(t, err, out)
require.Contains(t, out, "reading a dockerfile for a remote build invocation is currently not supported")
}